The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 2019
Filed:
Mar. 25, 2016
Lg Innotek Co., Ltd., Seoul, KR;
Eun Bin Ko, Seoul, KR;
Yong Jun Kim, Seoul, KR;
Ki Yong Hong, Seoul, KR;
Byung Hak Jeong, Seoul, KR;
LG INNOTEK CO., LTD., Seoul, KR;
Abstract
A red light emitting device, a method of fabricating a light emitting device, a light emitting device package, and a lighting system are provided. The red light emitting device may include a first semiconductor layer having a first conductivity, an active layer provided on the first semiconductor layer and including a quantum well and a quantum barrier, a second semiconductor layer having a second conductivity and provided on the active layer, a third semiconductor layer having the second conductivity on the second semiconductor layer, a fourth semiconductor layer having the second conductivity on the third semiconductor layer, and a fifth semiconductor layer having the second conductivity on the fourth semiconductor layer. The third semiconductor layer and the fourth semiconductor layer may include an AlGaInP-based semiconductor layer, and an Al composition of the fourth semiconductor layer may be lower than an Al composition of the third semiconductor layer.